Music: The Gathering is a service that manages a running playlist based on the physical proximity of users to a target wireless network. Once a recognized mobile phone joins the network, an Rdio playlist updates with music relevant to that device's owner. This ensures that everyone's music is represented equally at any social gathering.
The service works by first polling a router for connected devices. When a new device is detected, the app provides an interface for linking that device to an Rdio username. Once the phone's MAC address is linked to an Rdio username, it never needs to be linked again. When a previously configured device joins the network, an Rdio playlist automatically updates with that user's music. The end result is a playlist that reacts dynamically to your physical presence.